Have you tried getting apps through 1mobile.com or getjar.com? Using either of those you can install aldiko or mantano lite for your epubs. That's how I do it on my 1st gen Fire. So I can't say for sure if it will work on the HD.

Evey Web Site I go on that offers Apps for their site uses Google. Makes no sence to me. I have an epub ebook App but cant seem to get my Sony ebooks on it. Want the Sony eReader/Vudu/ and a few others BTW ALL are Freebies. No GetJar doent have them. Step 1 for downloading from Google is to get the Google Player App. BUT says Dont work with Kindles or Nooks. [Finally found that after I started this.]

What you need to try is this, on your Fire browser, go to 1mobile.com. Download and install their app. Then search on there for aldiko, and install it. Then you can load your Sony epubs (if they don't have DRM) and read them in aldiko on your Fire.

I can't remember if getjar uses an app or if you just download it from their site. Do so using the browser on your Kindle Fire, not your computer.

I prefer to read ebooks on my Fire in aldiko or mantano, versus the amazon app. So even Kindle books I usually convert and load in epub. Both of those apps have the capability to organize your books into collections. Plus they don't clutter the carousel that way, only the app (such as aldiko) will show on the carousel when you open it, but not the books you opened within the app.

Evey Web Site I go on that offers Apps for their site uses Google. Makes no sence to me. I have an epub ebook App but cant seem to get my Sony ebooks on it. Want the Sony eReader/Vudu/ and a few others BTW ALL are Freebies. No GetJar doent have them. Step 1 for downloading from Google is to get the Google Player App. BUT says Dont work with Kindles or Nooks. [Finally found that after I started this.]

Vudu is at 1Mobile Click arrow by install button and choose PC to download apk.

HELP! Ok took time off to re-group. As Said it Fire HD says the apk 1Mobile app IS there. But I cant get beyond the 1Mobile page that says it needs downloaded! So I cant get to the Vudu Apps or any other! This is on the Fire itself. I Can see it IF I click the Links in Blossoms coments.... ugh